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Simplifying
2d2 + 3 = 165
Reorder the terms:
3 + 2d2 = 165
Solving
3 + 2d2 = 165
Solving for variable 'd'.
Move all terms containing d to the left, all other terms to the right.
Add '-3' to each side of the equation.
3 + -3 + 2d2 = 165 + -3
Combine like terms: 3 + -3 = 0
0 + 2d2 = 165 + -3
2d2 = 165 + -3
Combine like terms: 165 + -3 = 162
2d2 = 162
Divide each side by '2'.
d2 = 81
Simplifying
d2 = 81
Take the square root of each side:
d = {-9, 9}
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